CN106787388B - A kind of bearing for axial-flux electric machine - Google Patents
A kind of bearing for axial-flux electric machine Download PDFInfo
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- CN106787388B CN106787388B CN201611192670.3A CN201611192670A CN106787388B CN 106787388 B CN106787388 B CN 106787388B CN 201611192670 A CN201611192670 A CN 201611192670A CN 106787388 B CN106787388 B CN 106787388B
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- bearing
- axial
- rotor
- electric machine
- flux electric
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a kind of bearings for axial-flux electric machine, including multiple in the bearing unit being circumferentially arranged, each bearing unit includes bearing roller and bearing base, bearing base with the stator of axial-flux electric machine for connecting, bearing roller is contacted with the rotor of axial-flux electric machine, bearing roller can be rotated around bearing base, and the tangential direction of the arrangement circumference of bearing unit is identical as the rotating direction of bearing roller, enable rotor normal rotation, the axial force of rotor can be transferred to the pedestal of stator and axial-flux electric machine by bearing roller simultaneously, influence of the axial out-of-balance force to rotor can be eliminated, the equalising torque that the tilting moment that rotor axial out-of-balance force generates is generated by bearing unit circumferentially, reduce the vibration of rotor during rotation, enhance the stability of rotor operation, extending makes Use the service life.
Description
Technical field
The invention belongs to axial-flux electric machine fields, more particularly, to a kind of bearing for axial-flux electric machine.
Background technique
In the field of the big torques of needs such as wind-power electricity generation, naval vessel traction, magneto has obtained extensively since its is high-efficient
Application, compared to the magneto of radial flux, axial flux permanent magnet motor is due to its overall compact structure, shorter axis
To length, higher efficiency and torque density are more suitable for low speed high torque application field.But axial-flux electric machine is being processed
Numerous challenges are faced on manufacture and installation and operation, seriously hinder the popularization and development of axial-flux electric machine.Large-scale axial magnetic flux
Motor leads to rotor two sides since its radial dimension is larger, when axial-flux electric machine be easy to cause rotor eccentricity during installation
Non-uniform air-gap causes rotor eccentricity and deformation to keep the electromagnetic force suffered by it unequal, and reduce rotor uses the longevity
Life.
Patent 201420716611.1 discloses a kind of bearing arrangement of larger axial force motor, has greatly for solving motor
Axial force load when be easy to cause bearing damage, and then the problem of lead to motor damage.As shown in Figure 1, being the larger axial force
The schematic diagram of the bearing arrangement of motor, 1- machine shaft, 2- internal bearing cover, 3- end cap, 4- angular contact bearings, outside 5- bearing
Lid, 6- sealing ring.Internal bearing cover 2 and bearing cover 5, end cap 3, internal bearing cover 2, bearing is fixedly mounted in the two sides of end cap 3 respectively
Closed chamber is formed between outer cover 5 and shaft 1, and is installed in series and has a pair of of angular contact bearing 4, therefore foring one kind can
Bear the bearing arrangement of large axial force.
Above-mentioned technical proposal propose it is a kind of bear larger axial force bearing arrangement, but this structure for root diameter compared with
The effect of big motor is unobvious, because bearing arrangement is only at spindle central added with bearing thus, if root diameter is larger, is turning
The deformation of sub- marginal portion can be very serious, and this bearing can not play a supporting role, therefore for turning caused by mismachining tolerance
Sub- bias bring axial direction out-of-balance force can not play a role, and be of limited application.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of bearings for axial-flux electric machine, it is intended to solve due to existing
Bearing, which is installed on axis, leads to that the axial-flux electric machine rotor eccentricity bring axial direction out-of-balance force of major diameter can not be played
Effect.
To achieve the above object, a kind of bearing for axial-flux electric machine provided by the invention, comprising:
The bearing unit of multiple circumferential arrays, each bearing unit are equipped with bearing roller and bearing base；Bearing roller phase
Bearing base is rotated, and bearing roller is rolled along the tangential direction of bearing unit arrangement circumference；Bearing roller be used for
Rotor contact, bearing base with stator for connecting.
Multiple bearing units are bonded by bearing roller with rotor surface, and during rotor rotation, idler wheel turns therewith
It is dynamic, reduce the frictional force of pair of rollers rotor, enables rotor normal rotation.When the rotor as caused by processing installation error
When eccentric, since the electromagnetic force imbalance of rotor two sides generates axial out-of-balance force on rotor, due to bearing unit and rotor
Contact, the axial out-of-balance force generated on rotor are transmitted to each bearing unit, the bearing base and axial magnetic of each bearing unit
The stator of three-way motor connects, and axial out-of-balance force is passed to stator, is transmitted to axial-flux electric machine by stator by bearing unit
Pedestal realizes the balance of axial out-of-balance force.Due to being relatively large in diameter for axial-flux electric machine, axial force generates big power of toppling
Square can generate larger torque since bearing unit is circumferentially arranged, and direction and tilting moment be on the contrary, make equalising torque,
To alleviate the vibration of rotor, its reliability of operation is enhanced, its service life is extended.
Further, bearing unit arrangement circle diameter is determined according to the root diameter of axial-flux electric machine, axial magnetic flux
The root diameter of motor determines the tilting moment that the rotor axial out-of-balance force of axial-flux electric machine generates, bearing unit arrangement circle
All diameters determine the torque that bearing unit generates, and therefore, the stator shaft orientation for capableing of effective balancing axial flux electric machine is uneven
The tilting moment that power generates.
Further, bearing unit further includes bearing shaft, and bearing base is equipped with shaft hole, and bearing roller is installed on axis
It forwards on axis, bearing shaft is installed in the shaft hole on bearing base.
Further, bearing base bottom is equipped with multiple through-holes being arranged symmetrically, for the stator with axial-flux electric machine
Connection.
Contemplated above technical scheme through the invention, compared with prior art, can obtain it is following the utility model has the advantages that
Provided by the present invention for the bearing of axial-flux electric machine, circumferentially using multiple bearing units, each bearing
The bearing roller of unit is contacted with rotor, and the idler wheel rotation direction of bearing is identical as rotor rotation direction, can make rotor just
It often rotates, the axial out-of-balance force on rotor can be transferred to stator by bearing unit, then be transferred to axial-flux electric machine
Pedestal can balance axial uneven on rotor simultaneously because multiple bearing units in circumferentially distributed, can generate biggish torque
The biggish tilting moment that the power that weighs generates, can effectively solve the problems, such as the axial out-of-balance force of axial-flux electric machine, reduce electricity
Vibration and noise in machine operational process, while protective effect is played to rotor, the mechanical strength of rotor is enhanced, is extended
The service life of rotor, while bearing unit is convenient for safeguarding and replaces, and reduces maintenance cost.
Detailed description of the invention
Fig. 1 is larger axial force motor bearings schematic diagram in the prior art；
Fig. 2 is the structural schematic diagram provided by the present invention for the bearing of axial-flux electric machine；
Fig. 3 is bearing and axial-flux electric machine stator scheme of installation, and schematic diagram direction is from rotor to stator direction
View；
Fig. 4 is bearing and axial-flux electric machine stator scheme of installation, and schematic diagram direction is from stator to rotor direction
View；
Fig. 5 is to install and cooperate provided by the present invention for the bearing of axial-flux electric machine and the rotor of axial-flux electric machine
Figure.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 2 is provided by the present invention for the structural schematic diagram of the bearing of axial-flux electric machine, and bearing includes multiple bearings
Unit, each bearing unit include bearing roller 5, bearing shaft 7 and bearing base 4, and bearing roller 5 is used for and axial magnetic flux
The mover of motor contacts, and bearing roller 5 is installed in bearing shaft 7, and bearing shaft 7 is installed on the upper spindle hole of bearing base 4
Interior, bearing base 4 is equipped with multiple through-holes 6 being arranged symmetrically, and through-hole 6 with the stator of axial-flux electric machine for connecting.
Fig. 3 is bearing and axial-flux electric machine stator scheme of installation, and schematic diagram direction is from rotor to stator direction
View, multiple bearing units 1 are installed circumferentially on the stator 2 of axial-flux electric machine, and the rotating direction of bearing roller with it is multiple
The tangential direction that bearing unit arranges circumference is identical.Fig. 4 is bearing and axial-flux electric machine stator scheme of installation, schematic diagram side
View from Xiang Weicong stator to rotor direction, in order to understand bearing unit and stator mounting structure, by a bearing unit in figure
It omits, bearing unit passes through stator hole 10, and bearing unit middle (center) bearing pedestal is mounted on stator base 8 by bolt, and floor 3 is installed
On 2 surface of stator, play the role of fixed stator disk, reinforces its mechanical strength.
Fig. 5 is that bearing and rotor installation cooperation are schemed, and in order to clearly indicate that bearing and rotor are installed, only provides rotor in figure
The bearing of side, in rotor other side, there are also the bearing units of identical arrangement.It is put from the part that Fig. 5 middle (center) bearing is installed with rotor
Big figure is as can be seen that bearing element direction is identical as stator direction of rotation.
All bearing units are bonded by bearing roller with rotor surface, and during rotor rotation, idler wheel is therewith
Rotation, reduces the frictional force of pair of rollers rotor, enables rotor normal rotation, turns when as caused by processing installation error
When sub eccentric, the electromagnetic force that will lead to rotor two sides is different, and the axial out-of-balance force generated on rotor passes through bearing unit
Rolling bearing is contacted with rotor, and the bearing base of bearing unit is connect with stator, axial out-of-balance force is transferred to stator, then
It is transferred to the pedestal of axial-flux electric machine, balances rotor axial out-of-balance force simultaneously because bearing unit is in axial arranging, energy
Biggish torque is enough generated, the big tilting moment generated by stator shaft orientation power is balanced, realizes the vibration for alleviating rotor, enhancing
Its reliability of operation, extends its service life.
Bearing unit arranges circle diameter and is determined according to the root diameter of axial-flux electric machine, due to axial-flux electric machine
Root diameter determines the size for the tilting moment that axial out-of-balance force generates on the rotor of axial-flux electric machine, works as axial magnetic flux
When the root diameter of motor is larger, needs to become larger bearing unit arrangement circle diameter, to balance tilting moment, work as axial magnetic flux
When the root diameter of motor is smaller, bearing unit arrangement circle diameter also accordingly becomes smaller.
By arranging bearing proposed by the present invention in axial-flux electric machine stator circumference, when rotor occurs eccentric, lead to
The supporting role for crossing bearing makes rotor also receive supporting role in outer edge, prevents rotor deformation.Compensate for existing bearing
The defect of stress can only be gone out in rotor axis.By the force analysis to bearing, when bearing proposed by the present invention not being added, rotor
Stress is 46MPa, and after this bearing is added, rotor stress is down to 24MPa, and stress is reduced by about 50%.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (4)
1. a kind of bearing for axial-flux electric machine characterized by comprising the bearing unit of multiple circumferential arrays, each
Bearing unit includes bearing roller (5) and bearing base (4)；The bearing roller (5) turns relative to the bearing base (4)
It is dynamic, and the bearing roller (5) is rolled along the tangential direction of bearing unit arrangement circumference；The bearing of each bearing unit
Idler wheel (5) with the rotor of axial-flux electric machine for contacting, and the idler wheel rotation direction of the bearing roller (5) and rotor rotate
Direction is identical, and the bearing base (4) with the stator of axial-flux electric machine for connecting.
2. bearing as described in claim 1, which is characterized in that the diameter of the bearing unit arrangement circumference is according to the axial direction
The root diameter of flux electric machine determines.
3. bearing as claimed in claim 1 or 2, which is characterized in that the bearing unit further includes bearing shaft (7), described
Bearing base (4) is equipped with shaft hole, and the bearing roller (5) is installed on bearing shaft (7), bearing shaft (7) peace
Loaded in the shaft hole on bearing base (4).
4. bearing as claimed in claim 3, which is characterized in that bearing base (4) bottom is equipped with multiple be arranged symmetrically
Through-hole (6), connect for the stator with axial-flux electric machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611192670.3A CN106787388B (en) | 2016-12-21 | 2016-12-21 | A kind of bearing for axial-flux electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611192670.3A CN106787388B (en) | 2016-12-21 | 2016-12-21 | A kind of bearing for axial-flux electric machine |
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| Publication Number | Publication Date |
|---|---|
| CN106787388A CN106787388A (en) | 2017-05-31 |
| CN106787388B true CN106787388B (en) | 2019-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611192670.3A Active CN106787388B (en) | 2016-12-21 | 2016-12-21 | A kind of bearing for axial-flux electric machine |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5124605A (en) * | 1991-01-11 | 1992-06-23 | American Flywheel Systems, Inc. | Flywheel-based energy storage methods and apparatus |
| JPH10246239A (en) * | 1997-02-28 | 1998-09-14 | Nippon Densan Corp | Rolling bearing and relevant product using the same |
| CN2377541Y (en) * | 1999-04-17 | 2000-05-10 | 曹少国 | Arrangement for testing DC resistance between commutator segments of armature |
| CN1297602A (en) * | 1998-03-25 | 2001-05-30 | 科洛克发展有限责任公司 | Device for forming doup edge with electromotor comprising rotor and stator for accommodating rotor |
| CN1637306A (en) * | 2003-12-25 | 2005-07-13 | 发那科株式会社 | Rolling bearing system |
| CN103219821A (en) * | 2012-01-20 | 2013-07-24 | 日本电产株式会社 | Motor |
| CN105257691A (en) * | 2015-11-16 | 2016-01-20 | 耒阳新达微科技有限公司 | Rotating bearing |
-
2016
- 2016-12-21 CN CN201611192670.3A patent/CN106787388B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5124605A (en) * | 1991-01-11 | 1992-06-23 | American Flywheel Systems, Inc. | Flywheel-based energy storage methods and apparatus |
| JPH10246239A (en) * | 1997-02-28 | 1998-09-14 | Nippon Densan Corp | Rolling bearing and relevant product using the same |
| CN1297602A (en) * | 1998-03-25 | 2001-05-30 | 科洛克发展有限责任公司 | Device for forming doup edge with electromotor comprising rotor and stator for accommodating rotor |
| CN2377541Y (en) * | 1999-04-17 | 2000-05-10 | 曹少国 | Arrangement for testing DC resistance between commutator segments of armature |
| CN1637306A (en) * | 2003-12-25 | 2005-07-13 | 发那科株式会社 | Rolling bearing system |
| CN103219821A (en) * | 2012-01-20 | 2013-07-24 | 日本电产株式会社 | Motor |
| CN105257691A (en) * | 2015-11-16 | 2016-01-20 | 耒阳新达微科技有限公司 | Rotating bearing |
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| Publication number | Publication date |
|---|---|
| CN106787388A (en) | 2017-05-31 |
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